Inject locale's requirements in your Symfony routes

Published on 2019-08-01 • Modified on 2019-08-01

This is a feature that was introduced in Symfony 4.1. It allows to directly inject a parameter in a route requirement instead of putting raw values. In this case, for this website, the locales_requirements parameter contains %locale%|fr, where locale is the default locale "en". When you want to add a locale to your project, all you will have to do is to add it to this parameter. (and translate everything of course 😁). Note that this annotation is declared at the controller level, therefore all actions declared in this one inherit from those requirements.

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#[Route(path: '/{_locale}/blog', name: 'blog_', requirements: ['_locale' => '%locales_requirements%'])]
final class BlogController extends AbstractController
{

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